Since both rectangles are similar, the following ratio must be fulfilled:

By multiplying both sides by 14, we get

and by subtracting 9 to both sides, we have

Therefore, the answer is 12.
The only point in the solution space is that of selection ...
C (1, 3)
Prob 70-74 depending on your school grading system
629,999 =630,000. Nearest hundred